"The serial number is invalid." Fix: You cannot use a Nero 7 or Nero 9 serial. The Micro edition has a specific key format. Look for Nero8_Micro_Key.txt in abandonware archives. Do not call Nero support; they discontinued this product in 2012.
Works as advertised — but only just.
Nero 8.3.2.1 Micro is a minimalist distribution that includes only and Nero Express . By stripping away multimedia editors, media players, and extra background services, it provides a high-performance tool for users who only need to rip, copy, and burn optical media. 2. Core Components Nero 8.3.2.1. Micro edition - only Burning Rom Express